Transmission-gearing.



NEWTON R. PILCHER, 0F AMARILLO, TEXAS.

TRANSMISSION-GERING.

releases.

Application filed. April 1G, 1917.

To all whom t may concern."

Be it known that l, NEWTON R. Pine/HER, a citizen oi the United States,residing at Amarillo, in the county of Potter and State of Texas, haveinvented certain new and useful lmproven'ients in Transmission- Gearing,of which the following is speciiication. h

My invention relates to improvements in variablo speed transmissiongearing, adapted `:For use upon automobiles or the like, While notnecessarily restricted to such use.

An important object of the invention is to provide apparatus ot' theabove mentioned character, which is so constructed that the variousspeeds may be obtained in a highly expeditious and convenient manner.

A further object of the invention is 'to provide apparatus of the abovementioned Character', having its parts arrzuxged in a Compact manner.

Other objects and advantages et the inventien will be apparent duringlthe course of the following description.

ln the accompanying drawing forming a part of this specicatlon.

The figure is a central horizontal sectional view through apparatusembodying the invention, parts being shown in elevation.

In the drawing, wherein ici the purpose of illustration is shown apreferred embodimentol. my invention. the numeral 1 designates easing,provided in its forward side with an opening receiving` a balhbearingil. Extending through and 'thin this .ballbearing is a drivi sha'it Thisdriying shaft connected with the crank shalt ot the engine, (not shown),to be4 driven thereby. The numerals ll, 5 and 6 designate low,intermediate, and high speed driving' bevel gears, riggidly mounted uponthe .driving shaft and disposed within the casing l.

The easing4 l is provided in its ends with openings for .receiving bailbearings 7. douriialed within these ball bearings are the ends of tubesor 'sleeves S, rigidly secured to the ends oi" a diliierentialgear-casing 5l. This differential geabeasing is preferably formed in twparts, as is customary. lt is thus apparent that the dillerenl'ialcar-cas- Specification of Letters Patent.

Patented @une el. l 918.

Serial No. 162,499.

ing is suitably supported and is free to re- Volve.

The numerals 10, 11, and 12 designate low, intermediate, and high speeddriven bevel gears, which permanently engage with the low.interl'nediate and high speed driving bevel gears 4, 5 and 6respectively. The driven bevel gear 10 is provided With a tubular hub13, whichV is rotatably mounted upon a tubular hub 14, carried by thedriven bevel gear 11. The tubular hub 14 is in turn rotatably mountedupon a tubular hub 15, which is rotatably mounted upon the sleeve S. Thetubular-'hub 1l is preferably provided with a ring 16 rigidly securedthereto by any suitable means, and bearing` balls 17 are preferablyarranged between the hubs 13 and lll, as shown. The tubular hub 15 has'aring 18 rigidly secured thereto, and bearing balls 19 are preferablyinterposed between the tubular hubs 141-. and 15, as shown. ltigidlyconnected with the outer end portion ot' the adjacent sleeve 8 is a diskor member 20, carrying a plurality of arms 21, rigidly secured thereto.These arms extend longitudinally of the sleeve 8 in parallel relationthereto, as shown. Bearing balls 22 are ,preferably arranged between thetubular hub 15 and the sleeveS, as shown.

The numerals 523, 24C and 25 designate clutch-elements or clutch-gears,rigidly attached to the ends of the tubular hubs 13, 'lill and 15,respectively. These gears are adapted t'or engagement with. ashii'tablel clutclrelement or clutch-gear 26, having,` openings 27formed therein, for the reception ot' the arms 21. The clutch-gear 26may be 'shifted by any suitable meanssuch as by a iorli 3. From theforegoing de* scription it is obvious that when the shittableclntclngear 2G' is moved into el'igagement with the l-.lul'cli-gear 23,the gear 10 will be locked to the sleeve S, for rotation therewith. litis obvious that by suitably shifting the clutch gear '2G into engagementwith clutchgea rs 'Jl and the gears' 1l and 12 may be locked to thesleeve 8. t

Arranged upon the opposite side of the gear fl with respect to the gearll), and therefore adapted to be driven in an opposite diis shiftedreetion by gear 1t, when engaging therewith, is a reverse bevehgear 29,having a tubular' hub 30, which is splined upon the adjacent sleeve 8.The bevel gear 29 normally discngages the bevel gear i and is held inthis outer position'by a spring 31. The gear 29 inwardly 'toengage withthe gear 4 by reciprocatory members or plungers il,

.pivotally connected with toggle joints 3,V

which are in turn pivoted to the casing 1'. These toggle jointsconnected therewith, as shown.

stub-shaftsBS, formedupon a 40, formed in the thereverse gear 29 in theouter 8y for rotation The numeral 35 designates shaft or axle sections,which are independently rotatable within'the sleeves 8. These 'shaftjoraxle sections project into the differential gearcasing 9, and'have bevelgears 86, rigidly secured thereto. These bevel gears engage withplanetary bevel gears 37, pivoted upon Y block 39 and extending Withinopenings casing 9. This is the construction pf the ordinary differentialgear and it is therefor' e thought unnecessary to further explain the'4same or its operation, it being suiiicient to state that theshaft-sections 35 which uare connected with the rearlwheels of theautomobile, may rotate together, as when the Iautomobile is traveling ina straight course', or'one shaft-section may rotate with respect to theother, when the automobile is round ing a curve. y

The operation of the apparatus is as-fol lows: y V

V' lhe driving shaft 3 may loe-'assumed to be continuously rotated, withthe shiftable clutch-gear 26 in the neutral positionfand or inactiveposition. To obtain either low intermediate or high forward speeds, th

lock-the proper gear'10,rl1 or 12 to the sleeve therewith. It is thusapparent that the rotation of the shaft 3 will be imparted to the sleevemedium` of the differential gear to the shaftsections-35. `When it isdesired to obtain a reverse speed, the clutch-gear 26 is shifted to theneutral position, and the rod 34 is moved forwardly .to bring the gear29 into engagement with the gear 4. The rotation of the shaft 3 istherefore reduced and transmitted in a reverse direction, tothe sleeve8, and by means of the 'differential gear, to

the shaft-sections 35.

It isLto be understood that the form of my invention" herewith shown anddescribed is to be taken as a preferred exan'iple of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subioined claims.

are spread by meansA of a reciprocatory member or rod 34, pivotally eoperator; shifts the clutchgear 26 tio/the position to 8, and through'the v lfln transmissiongearing of the char acter described,lthecombination with a driving shaft, 'of a. driven shaft, a plurality ofdifferent speed driving gears rigidly secured to the driving shaft, acorrespondingnu1nber of different speed driven gears rotatably mountedupon the driven shaft and pro vided with tubular hubs which telescopeand have their ends arranged in stepped rela# tion, clutch-gears`rigidly connected with the tubular hubs, a disk rigidly connected withthe driven shaft and carrying a plurality of arms extendingsubstantially parallel with the driven shaft, an annular shiftableclutchfgear mounted to slide upon the arms Having thus described myinvention, lv a and adapted for movement into engagement with a selectedone of the clutch-gears, and means to shift the annular shiftableclutchgear.

2. In transmission gearing ofthe character described, the combinationwith a driv ing shaft, of a driven shaft, a plurality of different speeddriving gears rigidly secured `tothe driving shaft, a correspondingninnber of different speed driven gears rotatably mounted upon thedriven yshaft and provided with tubular hubs which telescope and havetheir ends arranged in steppedV relation, clutclrgears rigidly connectedwith the tubular hubs, a disk rigidly connected with the driven shaftand carrying a pluralityT of armsl extending longitudinally of thedriven shaft, an annular shiftable clutch gear mounted to slide upon thearms and adapted for movement into engagement with a se llectetl one ofthe clutch-gears, means to shift theannular shiftable clutch-gear, areverse gear sphned upon the; driven shaft and arranged upon theopposite vside-of the driving gears with respect to the driven gears andlim adapted forv movement into and out Vof en gagement with and from onedriving gear, and means to shiftY the reverse gear.

3..n transmission gearing of the character described, the combinationwith a differential gear comprising` a gear casing sleeves connectedwith the gea-r casing and ranged in stepped relation, a olutlh gearrigidly connected with the ends of the tubn llar hubs, a disk rigidlyconnected with the driven shaft and Carrying a plurality of armsextending substantially parallel with the driven shaft, an annularshiftable clutchgear carried by the arms to move longitudinally thereofinto engagement with a selected one of the clutch-gears, means to shiftthe annular shftalale clutch-gear, a reverse 10

